Cylinder mount



July 9, 1957 F; s, FLICK ET AL CYLINDER MOUNT File'd DeG. 16, 1954UnitedStates Patent O CYLINDER MOUNT Francis SaFlick, Oak Park, andWalter J. Kudlaty, Ellnhurst, Ill., assignors toFlick-Reedy-Corporation, a corporation of Illinois Application December,1954, serial No. 475,614" 4 claims. (c1..s092) This invention relates toa mounting for a `piston and cylinder device and more particularly to aside or foot mounting of such character.

i Piston and cylinder devices may be mounted in various manner dependentupon the space 'availablev and the type of action which the cylinder isto accomplish. Some mountings are pivotal while other fix the piston andcylinder device in position relative to a base. The present inventionlis concernedwith the type of mountingsy referred to as side or foot`mountings which hold the cylinder immovable relative toa base.

Itis important that the mounting be rigid and permit keying of thecylinder against any movement. \A.desirable mounting. should. assumevery little space and also be `of such form that the distancebetween-the mounting lbase and centerline of the cylinder is. ata`minimum. Bending of the cylinder head under load inthe direction ofanyof its dimensions should. be avoided. The` location and form of themountingmay have. a1dei-nite relation to and may minimize such bendingor dellection under load.` The mounting lugs should `also be` as -closeto each other as possible to minimize beam action betweenlugs onthecylinder head and mounting. At the same time, themounting shouldbe ofsuch a character tha-tit may be attached tothe cylinderwithoutdisturbing` the cylinder assembly or be readilyinterchangeablewith other and different mountings.` The `presentinvention provides anew mountingfwhichmeets these desired features setout above.

It is, therefore, the principal object of this invention to providea newand `improved mount for a piston and cylinder device.

A further object is to provide a side or foot typemountirl-g` Whichrnaylbe secured as close as possible to the centerline ofthe cylinder.`

' Another object is to provide a side or foot mountingwhichsubstantially minimizes `deflection in the'` cylinder under load.

Another object is to provide a detachable foot mounting for a cylinderthat may lay within the longitudinal projection of the cylinder head orcap so as to retain both the minimum width and centerline heights of thecylinder without such mounting.

A further object is to provide a mounting which can be attached to thecylinder without substantially disturbing the cylinder assembly.

Other features, advantages and objects of the invention will be apparentfrom the following description taken in conjunction with theaccompanying drawings in which:

Figure 1 is a side elevational view of a piston and cylinder devicepartially broken away to illustrate the cylinder mount of the presentinvention; and

Figure 2 is a sectional view taken substantially along line 2-2 inFigure l, with the base and fastener omitted and looking toward thelefthand end of the cylinder as indicated.

The piston and cylinder device to which the present 2,798,777 PatentedJuly 9,. 1957 mounting is to be applied is either air or hydraulic, bothof which are manufactured to very close machine tolerances. Thecylinders are intended for continuous servieefor very long periodsoftime without attention. The use of `the cylinder is quite prevalent inthe machine tool field in applications requiring very accurate strokes,pressures and operation throughout long life.

The cylinder illustrated in the figures of the drawing includes a brassor. steel cylinder tube 3 mounted between a steel cap 4 and a similarhead 5 closing the endsof the tube. A retainer plate 6 is placedadjacent the head and the whole assembly` is held together by tie rods 7extending through the cap, head and retainer plate with appropriate nuts8 and 9`on either end of the tie rods. Suitable seals are providedbetween the tube 3 and the head and cap. An adjustable cushion lilwhichmay be in the form of a needle valve is shown at` each end of thecylinder along. with` a ball check 11 for obtaining quick release andreturnof the piston Within the cylinder. A piston rod 12 is shown. asextending through the head 5 and is provided with a threaded outer end13 and wrench flats 14. The piston Withi-nthe cylinder is not shown asit forms no part of the present invention. Fluid may be led intoeitherend. of the cylinder through ports connected topiping'l and` 16. Thedevice shown is thus a double acting piston although the invention isequally applicable to single acting piston and cylinder devices.

The mounting member of the present invention coniprises a one-piece lugwhich takes the place ot the ordinary nuts' 8 used onrthe'endof the tierod 7. The lugs for any particular size of cylinder are interchangeable.Ordi* narily fourfmounting lugs are usedto secure a cylinder' inplaceagainst a base support. Thus, the lugs would be attached to either endof the pair of tie rods on the side or` end ofthe cylinder.

The particular lugs, generally indicated 17, are generally square incross section as shown in Figure 2 and include a nut portion 18 having athreaded bore i9 for tightening the nut portion upon the threaded end20ot" upper; surface 24 and lower surface 2S are parallel and normal tothe face 23 and the cross bore is normal these surfaces. Theserelationships are retained eventhough the nut portion 1S of the lugmight be turned down to clear the bushing 28 on an oversized piston rod.

The heads of the cylinder are accurately milled to seat on a base 29.The present mount permits the milled surface to be held tightly againstthe base. The retainer plate 6 is usually about .0l0" less in width thanthe head 5. The lug is given a dimension such that it may be about 1m or.015" out of the plane of the @head 5 or cap 4 as the case may be. Thisinsures that when a bolt 27 or other fastener is placed in the crossbore to hold the cylinder in place against a base 28 that the head andcap of the cylinder will be tightly held against the base sup* port. Thepresent foot mounting also provides a shorter mounting length for agiven size cylinder than was previously available. Formerly, clearanceof the tie rod nuts required a longer foot mount and also one thatelevated the cylinder from the base to obtain clearance for the nuts onthe bolt and the normal tie rod nuts.

Referring particularly to Figure 2, it will be noted that a portion 26of the mounting lug extends over the retainavea??? ing plate 6 asufficient distance to be within the line of the cylinder tube 3. Theforce applied to the tie rod by tightening the mounting lug is thusdirectly in line with the cylinder tube. This avoids distortion andcontributes to the rigidity of the mounting. Any action of the cylinderunder load will be transferred to the mounting along the line of the tierods. This line of action is substantially closer to the center line ofthe cylinder than has heretofore been accomplished with side or foottype of mountings. ln the past, mountings on the side of a cyl inderpermitted a visible bending and movement of the cylinder under heavyloads. These side mountings being at the outer sides of the cylinderwere farther from the center line of the cylinder and thus did notresist beam action as does the present mount. The present lugs are inpart opposite the cylinder barrel and thus closer to the center line ofthe piston rod. Very little bending, if any, occurs when very high loadsare placed on the cylinder resulting in no movement of the cylinderbetween adjacent mountings. Also, there is no beam action longitudinallybetween opposite ends of the cylinder since the milled heads are heldfirmly on a base support.

The present mounting is particularly advantageous in that it permitskeying of the cylinder in place either at the head or cap end or simplywith a bar placed against the outer end of the mounting lugs.Ordinarily, cylinders used where close tolerances are required are keyedin place to avoid any movement because of the tolerances between thefastener and the cross bore in the mounting lug. Such keying is usualpractice with cylinders required for accurate work.

The mounting lugs require only one-fourth of a turn in any position toalign the sides of the lug with the sides of the head or cap. Inpractice, it has been found that such oneafourth turn does not place astrain on the tie rod outside of the normal tolerance permitted. Themounting lug does provide a very convenient and readily adjustable meansof mounting the cylinder. In operation, only the pair of nuts 8 and 9need be removed from one tie rod at a time in order to attach themounting. By following this procedure, the piston and cylinder assemblyis not particularly disturbed. The mount has the added advantage ofbeing interchangeable with other types of mounts as no specialpreparation of the cylinder or heads is required to attach the presentmount. The usual tie rods are used to secure the mounting lugs to thecylinder and they may be later removed to substitute other mounts suchas pivot or flange mounts.

The foregoing detailed description has been given for clearness ofunderstanding only, and no unnecessary limitations should be understoodtherefrom, for some modifications will be obvious to those skilled inthe art.

We claim:

1. A tie rod mounted piston and cylinder device secured againstdeflection due to load, comprising: a cylinder having a square head ateach end and tie rods extending through the heads, a plurality of onepiece lugs each hav 4: ing an internally threaded nut portion at one endfo tightening the lugs upon threaded ends of the tie rods against theadjacent cylinder head to hold the cylinder and heads together, each lughaving a cross bore extending through the lug adjacent to said nutportion for receiving a bolt fastener to hold the attached cylinderdevice heads against a base, said cross bore being alignedlongitudinally with its respective tie rod, said lugs having sidesspaced slightly inwardly of the sides of the adjacent head to secure thehead against the base and loads on the cylinder being transferredthrough the lugs to the base substantially along the line of the tierods.

2. A foot mounted piston and cylinder device, comprising: a cylinderhaving heads and tie rods extending through the heads, each head havinga Hat surface for supporting the cylinder upon a base; a plurality oftie rod mounting lugs each having a nut portion threaded upon fone endof the tie rods adjacent said at surfaces, a flat face on each lug forabutting the face of the adjacent head and a pair of parallel surfacesnormal to said flat face, said lugs each having an opening extendingthrough said parallel surfaces to receive a fastener to secure thedevice on the base, said openings being aligned longitudinally with thetie rods so as to position the securing fasteners relatively near thecenter line of the cylinder avoiding beam action under heavy loads.

3. A tie rod mount as specified in claim 2 wherein the lug is square incross-section and is of a size substantially to align at least two sidesthereof with square sides of a cylinder head, said sides of the lugbeing spaced inwardly of the sides of the cylinder head notsubstantially more than .015 inch.

4. A foot mounted piston and cylinder device, comprising: a cylinderhaving heads and tiev rods extending through the heads, each head havinga at surface for supporting the cylinder upon a base; a plurality of tierod mounting lugs each having a nut portion threaded upon one end of thetie rods adjacent said at surfaces, a at face on each lug for abuttingthe face of the adjacent head and a pair of spaced surfaces extendingfrom said flat face generally in the direction of the tie rod, said lugseach having an opening extending through said spaced surfaces generallynormal to the respective tie rods to receive va fastener for securingthe device on the base, said openings being aligned longitudinally withthe tie rods so as to position the securing fasteners relatively nearthe center line of the cylinder avoiding beam action under heavy loads.

References Cited in the file of this patent UNITED STATES PATENTS1,609,772 Rank Dec. 7, 1926 1,820,269 Craig Aug. 25, 1931 2,332,786Fairhurst et al Oct. 26, 1943 2,410,808 Christensen Nov. 12, 19462,424,800 Coverley et al. July 29, 1947

